Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe0b514b64812be…

MALICIOUS

PDF

104.9 KB Created: 2021-08-22 03:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed46812dad849949d18aa95abd783a3a SHA-1: aed16e376259df869bf244f8f9f10818a6a02aca SHA-256: 0fe0b514b64812be6e39dd7601216c13f75e3c54514d3e5efed26d67997368c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a lure document designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7484175525---zoxorolis.pdf In PDF document text
    • http://alnoorcity.com/userfiles/file/detubavarinarepebanuvum.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/47192041107.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/xexoti.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/41884638265.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a848a3a3---kubikezivipisize.pdfIn PDF document text
    • https://goodline.by/userfiles/file/75173435035.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6a9b4889---dawuzujitibewerilofurizu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e50b755ea---puledakomosuxugaja.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/27150bbb324e29685453fbac1d32a4cb/88312733238.pdfIn PDF document text
    • https://greenvision.vn/hinhanh_fckeditor/file/mizelunatejalu.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/u8tk7f20n2q3e833afn2a00eu2/97920671757.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bce5288ebf5---66065883177.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/76519822070.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/69a7621c2d70d1c126ca54a169a7b2a2/xuwaranafimaka.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/gijegumawobumawakal.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9fd7285861dbff183e54755a73044f32/57587648295.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608623cdef84d---76186510382.pdfIn PDF document text
    • http://sivam.pl/files/file/92517213281.pdfIn PDF document text
    • https://emenu.hu/editor_up/75000112141.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/tuvoxonedidigu.pdfIn PDF document text
    • http://svx.su/ffile/file/60348954334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=importance+of+school+rules+and+regulations+essayPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 16804 bytes
SHA-256: bc79f598a15df1161ca952fc4d398c55422dc44fe383c3c9654252cc17919ea4
font_01_sfnt_off000162c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C6 11232 bytes
SHA-256: c4016f32c77cc96617d31de4b1a9221d5fd55a9c4c8effefa1abf2de0c4a14bc
font_02_sfnt_off00017cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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